************************************************************ * * * landis.do * * * * PURPOSE: read the multi-center data * * * * DATE: 01/04/05 * * * ************************************************************ infile clinic str5 tx str5 y count using c:\B513\landis.data *** *** look at the character variables *** tabulate y tx [freq=count], chi2 col *** *** recode the character as numeric *** encode y, generate(yn) recode yn 1=1 2=0 label define ynames 0 "(-)" 1 "(+)" label values yn ynames table y yn [freq=count] encode tx, generate(txn) recode txn 1=0 2=1 label define tnames 0 "control" 1 "treatment" label values txn tnames table tx txn [freq=count]